Method for monitoring an electromagnetic actuator
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United States of America Patent
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Jan 21, 2003
Grant Date -
N/A
app pub date -
Feb 4, 1999
filing date -
Jun 5, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a method for monitoring an electromagnetic actuator having at least one electromagnet. This electromagnet acts on an armature, which is displaceable against the force of at least one pull-back spring, and is used for operating an actuator, in particular an electromagnetic actuator for operating a gas exchange valve on the cylinder of an internal combustion engine. In accordance with this method, the electric power of the magnet is controlled via an electric control system. The other electric power parameter, which depends on the controlled electric power parameter, serves as a monitoring parameter, and its curve in time is determined as an actual value, which is then compared with a theoretical value. This theoretical value is the curve in time preset in the control system to ensure correct functioning. In the case of a discrepancy between these two values, an adjustment signal is produced.
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